QCD matching conditions at thresholds

1993/05/24 by German Rodrigo, Germán Rodrigo, Arcadi Santamaria · 6 citations
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph

paper · pdf · doi:10.1016/0370-2693(93)90016-b

published as Phys.Lett. B313 (1993) 441-446 · 9 pages and 2 postscript figures added after the TeX file, LaTeX, CERN-TH.6899/93

arxiv created 1993/05/24 · openalex publication_date 1993/09/01 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/01

Abstract

The use of MS-like renormalization schemes in QCD requires an implementation of nontrivial matching conditions across thresholds, a fact often overlooked in the literature. We shortly review the use of these matching conditions in QCD and check explicitly that the prediction for α_s(M_Z), obtained by running the strong coupling constant from the M_τ scale, does not substantially depend on the exact value of the matching point chosen in crossing the b-quark threshold when the appropriate matching conditions are taken into account.

Citations

• Infrared singularities and massive fields

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